Speed-timing attachment for bicycles, &amp;c.



No. 785,515. PATENTED MAR. 21, 1905. A. L. MCMURTRY.

SPEED TIMING ATTACHMENT FOR BIGYQLES, 6m.

APPLIOATION FILED JUNE 8, 1904.

Patented March 21, 1905.

UNITED STATES PATENT OFFICE.

ALDEN L. MGMURTRY, OF NEV YORK, N. Y.

SPEED-TIMING ATTACHMENT FOR BICYCLES, 81.0.

SPECIFICATION forming part of Letters Patent No. 785,515, dated March21, 1905.

Application filed June 8,1904. Serial No. 211.686.

To (do whom, it may concern:

Be it known that I, ALDEN L. lVICMUR'rRY, a citizen of the United Statesof America, residing in the borough of Manhattan, city, county, andState of New York, have invented certain new and useful Improvements inSpeed-Timing Attachments for Bicycles and other Vehicles, of which thefollowing is aspecilication.

This invention comprises an apparatus for attachment to a bicycle orother vehicle by which it is driven and serves to indicate the timeconsumed in traversing a given distance. For instance, in the case of abicycle policeman desiring to obtain a record of the speed of anautomobile for a tenth or an eighth of a mile or for a longer or shorterdistance (determined by the adjustment or arrangement of the apparatus)there is provided a means for starting a stop-watch, arresting it whenthe prescribed distance has been traversed, and ultimately when desiredresetting it at zero, all at the will of the rider.

In the accompanying drawings, Figure 1 is a plan view; Fig. 2, a sideelevation of one side; Fig. 3, an elevation of the opposite side, theparts being shown inverted; Fig. 4:, a detail View showing the notchedor cam ring and a cooperating arm that controls the stop-watch, and Fig.5 an elevation showing the holder for the stop-Watch.

a is a shaft driven from a rotating part of the bicycle or other vehiclein any suitable way, so that the shaft will be rotated at appropriatespeed, as will hereinafter appear. This shaft has an elongated bearingat in the frame of the apparatus and carries at its end one member I) ofa clutch that may be an ordinary toothed clutch, as shown, or of anyother appropriate construction. The opposite members c of the clutch iscarried upon the end of a shaft (Z, splined in a worm 6, held betweenplates or posts ff. A spring g, enveloping the shaft and interposedbetween the clutch head or member 0 and the adjoining plate f, tendsnormally to close the clutch. Parallel with the shaft (Z and mounted tomove end- Wise in the plates or posts f is a rock-shaft h, which alsohas a bearing in a coupling block or piece it, rigidly connected to theshaft (Z near the end opposite the clutch. The arrangement is such thatthe shaft It may rock, while the two shafts are coupled to move endwisetogether. The worm 0 gears with the wormwheel 2 having upon its face anupwardlyprojectingannular flange or ring from which projects laterally astop 7", that abuts against a corresponding stop Zr on theendwise-movable shaft It. A radially-projecting arm 71. at one end ofthe rock-shaft it has connected to it a cord 71.", extending intoconvenient reach of the rider of the bicycle or occupant of the vehicle.

hen the worm-gear '2; has been driven into the position shown in Fig. 1,the stop 7', acting on the stop K, has moved the rock-shaft endwise andseparated the members of the clutch. A suitable strain upon the cord71/" rocks the shaft and carries the stop 711' thereon out of engagementwith the stop j, when the reaction of the spring g brings the members ofthe clutch into engagement. The worm will now be rotated and will drivethe'wormgear 1' through one revolution until the stop 7" again acts toseparate the members of the clutch.

The front of the frame is formed with a vertically-disposed plate m,having on opposite sides near its bottom clips m m to receive and hold astop-watch a, the post of which is also embraced and held by spring-jawsm near the top of the watch-supporting plate. Extending diametricallyacross and above the worm-gear v is a horizontal arm 0, pivoted at itsrear end upon a horizontal pivot a and carrying in its front end ascrew-threaded adjustable post 7), arranged in'imediately over thesetting head or post of the watch. A spring (1 normally tends to drawthe arm 0 downwardly and cause the adjustable post 91 to bear upon thesetting-head. of the watch. This action, however, is normally preventedby a lug on the arm 0, that bears upon the upper face of the ring j. inthe ringin close relation to each other are formed three recesses orcam-notches 1 2 3.

When the parts are in the position shown in Fig. 1, with thedriving-clutch disengaged, the lug on the pivoted arm 0 rests upon thering between the notches 3 and 1. If new a strain be exerted upon thecord, the clutch c 1/ is closed, the worm commences to rotate, and theworm-gear 2' is revolved in the direction of the arrow, the lug 0 dropsinto the recess 1, and the adjustable post p is drawn with sufiicientviolence against the setting-head of the Watch, and the watch that hasbeen previously stopped merely is thereby reset to zero. The lug 0 thenrides upon the ring between the recesses 1 and 2 and then falls into therecess 2, thereby starting the watch. This condition is maintained untilthe revolution of the ring ,y' brings the notch 3 under the worm 0, whenthe latter will again be drawn down by its spring and the watch stopped.Then as the arm 0 rides up on the ring at the rear of the notch 3 thestops 1" come into engagement, the clutch is opened, and motion of theparts ceases. The watch will now show the period of time during whichthe notch 2 has traveled from under the pivoted arm 0 and the notch 3brought under that arm when, as stated, the watch is stopped. the pitchof the worm and worm-gear 7: and speed rotation of the shaft (4 mayreadily be made such that the time consumed in this traverse of the ringunder the arm n will represent a fixed distance traversed by the vehiclefor instance, a tenth or an eighth of a 1nilewhile the watch preserves arecord of the time consumed in traversing that distance.

1 claim as my invention 1. In a timing attachment for vehicles, thecombination of a part adapted to be driven relatively to the speed ofthe vehicle, a part actuated thereby at the will of the rider, meanscontrolled by the second-named part acting to automatically start astop-watch and automatically stop it after the vehicle has traveled adetermined distance, and means automatically acting to throw thesecond-named part out of operation when the watch has been stopped.

2. in a timing attachment for vehicles, the combination of a partadapted to be driven relatively to the speed of the vehicle, a partactuated thereby at will of the rider, means controlled by thesecond-named part acting to The relation of automatically reset andstart a stop-watch and automatically stop it after the vehicle hastraveled a determined distance, and means automatieally acting to throwthe second-named part out of operation when the Watch has been stopped.

3. A timing attachment for vehicles, comprising the combination of ashaft adapted to be rotated relatively to the speed of the vehicle, amember of a normally open clutch carried thereby, a part carrying thesecond member of the clutch, a rotatable member geared to said part, aspring normally tending to close the clutch, means acting to hold theclutch open when the rotatable member has been driven into normalposition, a device under the control of the driver by which said meansmay be thrown out of action to permit the closing of the clutch, andmeans controlled by the rotatable member during its return to normalposition acting to start a stop-watch and stop it after the vehicle hastraversed a determined distance.

et. A timing attachment for vehicles, comprising the combination of ashaft adapted to be rotated relatively to the speed of the vehicle, amember of a normally open clutch carried thereby, a part carrying thesecond member of the clutch, a rotatable member geared to said part, aspring normally tending to close the clutch, means acting to hold theclutch open when the rotatable member has been driven into normalposition, a device under the control of the driver by which said meansmay be thrown out of action to permit the closing of the clutch, andmeans controlled by the rotatable member during its return to normalposition acting to reset and. start a stopwatch and stop it after thevehicle has traversed a determined distance.

In testimony whereof I. have hereunto subscribed my name.

ALDEN L. BIOMURTBY.

Witnesses:

KATHARINE MAoMAnoN, LILLIE F. BnowNlNo.

